Sylvania



(No Model.)

F. W. HOOS & E. MANN.

10B MACHINE. No. 469,999. Patented Mar. 1, 1892.

WITNESSES: M MIVENTOR% l on Q a: [LP By (if ,QWVMJ. igeudbliaywwfii NITED STATES PATENT OFFICE.

FLORENCE WILLIAM HOOS AND EMIL MANN, OF PHILADELPHIA, PENN- SYLVANIA.

ICE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 469,999, dated March 1, 1892. Application filed October l7 1891. Serial No. 409,012. (No model.)

To aZZ whom it may concern:

Be it'known that We, FLORENCE \VILLIAM Hoos and EMIL MANN, citizens of the United States, both residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Ice-Machines, which improvement is fully set forth in the following specification and accompanying drawings.

Our invention relates to improvements in ice-machines; and it consists of means, substantially as described, for automatically feeding the still thereof from an overflow-tank.

It further consists of the combination of parts hereinafter set forth.

Figure 1 represents a side view of an icemachine embodying our invention. Fig. 2 represents a sectional view on line as as, Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures.

Referring to the drawings, A designates a still or boiler having an inlet 13 therein and an outlet-pipe C with a valve D therein. The pipe 0 leads from the still A to the anhyd rousammonia receiver E, a portion of said pipe being coiled, forming a condenser D. A pipe F leads from the said receiver to the expansion-coils G, connected with the pipe H, which passes over the condenser-coils D to an absorber J. Leading from the lower end of the still A is a pipe L, which has a valve K therein and is provided with the coils L, located below the condenser-coils D, the continuation of the said pipe beyond the coils entering the absorber J at or near the lower end thereof. An air or vapor pipe M, provided with a valve M, leads from the upper end of the absorber J downwardly and into a water vessel M located on the floor or lower part of the machine. A pipe N connects the upper part of the absorber with an injector P, and a pipe Q leads from said injet-or to the still A. The pipe N is provided with a valve R, and the pipe Q is provided with a check-valve S and a controlling-valve T, the latter being between the said check-valve and the still.

U designates an overflow-tank directly connected by the pipe V with the absorber J and provided with a pipe W, which communicates with the injector P and is connected by a branch pipe W with the pipe N. The said branch XV has a valve X therein, and the pipe WV is provided with a valve Y between the branch pipe and the injector.

Z designates a hot-gas pipe leading'from the still to the injector, and A a valve therein.

The operation of the device is as follows: A strong solution of aqua-ammonia is poured into the still A through the inlet B, which is then closed and the still heated until the gage B registers a pressure of one hundred and twenty pounds, when the valve D is opened and the ammonia-gas is set free, passing into the pipe 0, and thence to the anhydrous-ammonia receiver E through the coils D, which form a condenser for the heated gas therein. From the receiver E the gas then passes through the pipe F into the expansion-coils G, whereby its temperature is greatly reduced, returning by the pipe H over the said condenser-coils D to the absorber J. At the same time the weak aqua-ammonia in the still A will by the pressure therein, the valve K being open, pass through the pipe L, where itis cooled by the condenser-water, passing then into the absorber J, where it mixes with the gas from the expansion-coils G, thereby forming strong am monia-water. To set free or expel the air in the apparatus, the valve M in the pipe M is opened, when the air in the absorber, being under pressure, will escape through said pipe into the water in the vessel M rising by bubbles to the surface thereof, any escaping ammoniac gas being absorbed by the water in said vessel. By closing the valves X and A and opening the valves R and T the feed of the ammonia is directed from the absorber through the injector to the still, the overflow passing from the injector into the pipe W, and so into the overflow-tank. The valve A of the pipe Z is now opened, and the hot gas from the upper portion of the still passes through the injector, and, mixing with the ammonia, combines with the same as it enters the still through the pipe Q. When the ammonia in the overflow-tank is to be fed to the still, the valve R is closed and the valve X is opened, when the am moni'a under pressure in the said tank flows through the pipe W and valve X into the injector, and then through pipe Q into the still, whereupon the valve A is opened, permitting the hot gas from the still to escape from the same and mingle with ammonia passing through the injector.

The overflow-tank may receive ammonia directly from the absorber by means of the pipe V, when so desired. It will be seen that the pressure in the overflow-tank is utilized to convey the ammonia in the same to the still Without employing a pump.

Having thus described our invention, What We claim as new, and desire to secure by Letters Patent, is-

1. In an ice-machine, an absorber, an overflow-tank, a still, a condenser, pipes leading from said still to said absorber through said condenser, and an injector with pipes leading from said absorber and overflow-tank to said still, said parts being combined substantially as described. I

2. In an ice-1n achine, an absorber, a still, an injector, an overflow-tank, a pipe leading from said absorber to said injector, a valve in said pipe,a pipe leading from said injector to said still, a controlling and acheck valve in said latter pipe, a pipe leading from said injector to said overflow-tank withavalve therein, and a pipe leading from the latter pipe between said latter valve and the tank to the injector, said parts being combined substantially as described.

In an ice-machine, an absorber, an overflow-tank, a still, an injector, a pipe leading the injector having avalve therein,saidparts 40 being combined substantially as described.

FLORENCE \VILLIAM IIOOS. EMIL MANN. \Vitnesses:

JOHN A. WIEDERSHEIM, R. H. GRAESER. 

